Dorman M39040 Brake Master Cylinder

Reliable Brake Master Cylinder for Toyota Celica

The Dorman M39040 brake master cylinder is designed specifically for Toyota Celica models, providing precise hydraulic control for your vehicle's braking system. Crafted from durable cast iron, this master cylinder includes a reservoir and features a dual outlet design to ensure consistent brake fluid distribution.

• Compatible with Toyota Celica models
• Master cylinder bore diameter: 0.813 inches
• Constructed from cast iron for durability
• Includes reservoir for brake fluid
• Two outlets with rearward outlet size M10 x 1.0 and 10mm secondary outlet thread diameter
• Thread pitch of 1.0 for secure connections
• Package contains the master cylinder only; mounting hardware not included

Product Details and Specifications

The Dorman M39040 brake master cylinder is engineered to meet the hydraulic requirements of Toyota Celica vehicles. Its 0.813-inch bore diameter ensures proper pressure generation within the braking system. The cast iron construction offers strength and resistance to wear, supporting long-term performance. This master cylinder comes with an integrated reservoir, simplifying installation and maintenance. Featuring two outlets, including a rearward outlet sized M10 x 1.0 and a secondary outlet with a 10mm thread diameter, it facilitates efficient brake fluid flow to the brake lines. The 1.0 thread pitch ensures compatibility with standard brake line fittings.

Common Applications and Problem Resolution

• Replaces worn or leaking brake master cylinders on Toyota Celica
• Addresses brake pedal sponginess caused by internal cylinder wear
• Restores proper hydraulic pressure for consistent braking performance
• Fixes brake fluid leaks from the master cylinder reservoir or outlets
• Improves overall brake system reliability and safety

Installation Notes and Tips

Installation of the Dorman M39040 brake master cylinder requires basic mechanical skills and proper tools. Since mounting hardware is not included, retain original mounting bolts or acquire compatible replacements. Ensure brake lines are properly connected to the two outlets, matching the rearward outlet size M10 x 1.0 and secondary outlet thread diameter of 10mm. After installation, bleed the brake system thoroughly to remove air and verify proper brake pedal feel. Consult the Toyota Celica service manual for torque specifications and detailed procedures.

Quality Assurance and Warranty

Dorman manufactures the M39040 brake master cylinder to meet or exceed OEM standards for fit, form, and function. The cast iron material and precise machining contribute to reliable performance under normal operating conditions. While specific warranty details may vary, Dorman typically offers limited warranties covering defects in materials and workmanship. Refer to Dorman’s official documentation for exact warranty terms applicable to this part.